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Friday 16 December 2011

Nokia 2720 fold keypad connection tracks with filter IC jumper ways



Here's the Nokia 2720 fold solution for not working keypads problem. This solution provides the connection line paths of the keypad interface.

This may only works for hardware failure, so you may first try to ensure that the device firmware is okay and already calibrated.  Clean the whole keypad interface including the keypad membrane if an oxidation build up found. Check also the silicone rubber keypads of its still in good condition.
You may refer to the given solution below if the above basic procedures does not solved the problem. and follow some step by step procedures that we prepared.

In this solution the POWER/END key is not included but we also have prepared a jumper solution for it., this may only works for numeric and navigation keys such as the following: 1, 2 ,3 ,4 5, 6, 7, 8, 9, *, 0, #, UP, DOWN, LEFT, RIGHT, Soft Left, Soft right, Select/Action and Send.



Nokia 2720 fold keypad connection tracks with filter IC jumper ways
nokia 2720 fold keypad jumper ways repairing picture
Repair hints for Nokia 2720 fold mobile phone keypad problem:
If there is only one or two keypad keys isn't responding, you may only suspects that the problem may lies in an open line paths. Just trace the connection of that said keys, then managed to establish a jumper on it.
If more than three or four keypad keys doesn't work, you may suspect that the problem lies on a open connection line paths or either the keypad filter IC. Check and trace the connection of those keypad keys and then replace the keypad filter IC if the connection paths is okay.
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